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Label-Free Immunoprecipitation Mass Spectrometry Workflow for Large-scale Nuclear Interactome Profiling

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Proliferating cell nuclear antigen: a proteomics view.

¹Tumour Biology Group, Northeastern Ontario Regional Cancer Program at the Sudbury Regional Hospital, 41 Ramsey Lake Road, Sudbury, Ontario P3E5J1, Canada. snaryzhny@hrsrh.on.ca

Cellular and Molecular Life Sciences : CMLS

|August 30, 2008

Summary

Proliferating cell nuclear antigen (PCNA) is a key protein in DNA replication and repair. Proteomics studies reveal numerous PCNA interactions, suggesting diverse cellular roles beyond its known functions.

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Area of Science:

Molecular Biology
Cell Biology
Biochemistry

Background:

Proliferating cell nuclear antigen (PCNA) functions as a DNA sliding clamp essential for eukaryotic DNA replication and repair.
PCNA exhibits dynamic nuclear mobility, existing in soluble or chromatin-associated forms, indicating its involvement in various cellular processes.

Purpose of the Study:

To explore the multifaceted roles of PCNA by investigating its interactions and modifications.
To leverage proteomics to uncover novel PCNA functions and binding partners.

Main Methods:

Application of proteomics approaches to characterize PCNA interactions.
Analysis of PCNA's heterogeneity and post-translational modifications.

Main Results:

Identification of multiple PCNA-interacting proteins with diverse activities.
Evidence suggesting previously unrecognized functions of PCNA in cellular processes.

Conclusions:

The extensive network of PCNA interactions and modifications supports its role in a wide spectrum of cellular functions.
A proteomics-driven perspective is crucial for a comprehensive understanding of PCNA's biological significance.